Splitting the standard library: rename swift_stdlib.dylib -> swift_stdlib_core.dylib according to the directory name.
Splitting the standard library: rename swift_stdlib.dylib ->
swift_stdlib_core.dylib according to the directory name.


Swift SVN r5881

apple/swift-corelibs-foundation,apple/swift-corelibs-foundation,apple/swift-corelibs-foundation,apple/swift-corelibs-foundation,apple/swift-corelibs-foundation